Granted Patent
Utility
US 4,264,223 · App. 06/000,233
Reversible ribbon cartridge for a high speed impact printer
Inventors:
John D. Bemis, Rowland V. D. Firth, III, Willie Goff, Jr., Richard T. Stone
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Jan 2, 1979
Inventors
John D. Bemis
Rowland V. D. Firth, III
Willie Goff, Jr.
Richard T. Stone
Assignee (at issue)
International Business Machines Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.